Cutting - edge research has identified ways in which changes to climatic conditions — such as abnormally warm summers — reduce economic activity,
damage food production systems, increase social conflict, and generate migrants.
3) indirect impacts mediated through societal
systems, such as undernutrition and mental illness from altered agricultural
production and
food insecurity, stress and undernutrition and violent conflict caused by population displacement, economic losses due to widespread «heat exhaustion» impacts on the workforce, or other environmental stressors, and
damage to health care
systems by extreme weather events.